Help Buttercup and Westley to arrive safely at the end! Collect the gems on the way to earn extra points. Buttercup can jump higher, Westley can kill the big rat Rous with his sword: you should use both abilities to advance.
Arrow keys left/right to move, arrow key up to jump. Space bar to attack. Click at the portraits of Buttercup and Westley to change character, or use the CTRL keys and Z to switch between them.